<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
        <!-- 添加角色按钮区域 -->
        <el-row>
            <el-col>
                <el-button type="primary">添加角色</el-button>
            </el-col>
        </el-row>
        <!-- 角色列表区 -->
        <el-table :data="rolelist" border stripe>
            <el-table-column type="expand">
                <template slot-scope="scope">
                    <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级权限 -->
                        <el-col :span="5">
                            <el-tag  closable @close="removeRightById(scope.row, item1.id)">
                                {{item1.authName}}
                            </el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <!-- 渲染二级和三级权限 -->
                        <el-col :span="19">
                            <el-row v-for="(item2, i2) in item1.children" :key="item2.id" :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']">
                                <el-col :span="6">
                                    <el-tag type="success"  closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <el-col :span="18">
                                    <el-tag closable @close="removeRightById(scope.row, item3.id)" type="warning" v-for="(item3, i3) in item2.children" :key="item3.id">{{item3.authName}}</el-tag>
                                </el-col>
                            </el-row>
                        </el-col>
                    </el-row>
                </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                    <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
        </el-table>
    </el-card>

    <!-- 分配权对话框 -->
    <el-dialog
    title="分配权限"
    :visible.sync="setRightDialogVisible"
    width="50%" @close="setRightDialogClose">
        <!-- 树形控件 -->
        <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defkeys" ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRight">确 定</el-button>
        </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
    data () {
        return {
            rolelist: [],
            setRightDialogVisible: false,
            rightslist: [],
            // 树形控件的属性绑定对象
            treeProps: {
                children: 'children',
                label: 'authName'
            },
            defkeys: [],
            roleId: ''
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
        async getRolesList () {
            const { data: res } = await this.$http.get('roles')
            if(res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败')
            }

            this.rolelist = res.data
            console.log(this.rolelist)
        },
        async removeRightById (role, rightId) {
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch( err => err )

            if(confirmResult !== 'confirm') {
                return this.$message.info('取消了删除')
            }

            const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

            if(res.meta.status !== 200) {
                return this.$message.error("删除权限失败")
            }

            role.children = res.data
        },
        // 展示分配权限的对对话框
        async showSetRightDialog (role) {
            this.roleId = role.id
            // 获取权限的数据
            const { data: res } = await this.$http.get('rights/tree')
            if(res.meta.status !== 200) {
                return this.$message.error('获取权限失败')
            }
            // 获取到的权限数据，保存到data中
            this.rightslist = res.data
            this.getLeafKeys(role, this.defkeys)
            this.setRightDialogVisible = true
        },
        // 通过递归的形式获取角色下所有三级权限的id，保存到defkeys中
        getLeafKeys (node, arr) {
            if(!node.children) {
                return arr.push(node.id)
            }
            node.children.forEach( item => this.getLeafKeys(item, arr))
        },
        // 监听分配权健对话框的关闭事件
        setRightDialogClose () {
            this.defkeys = []
        },
        async allotRight () {
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')
            const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })

            if(res.meta.status !== 200) {
                return this.$message.error('分配权限失败')
            }
            this.$message.success('分配权限成功')
            this.getRolesList()
            this.setRightDialogVisible = false
        }
    },
}
</script>

<style lang="less" scoped>
.el-tag {
    margin: 7px;
}
.bdtop {
    border-top: 1px solid #eee;
}
.bdbottom {
    border-bottom: 1px solid #eee;
}

.vcenter {
    display: flex;
    align-items: center;
}
</style>